T HonjoSummaryAffiliation: NTT Communication Science Laboratories Country: Japan Publications
 Collaborators

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Publications
 Differentialphaseshift quantum key distribution experiment with a planar lightwave circuit MachZehnder interferometerT Honjo
NTT Basic Research Laboratories, NTT Corporation, Atsugi shi 243 0198, Japan
Opt Lett 29:27979. 2004..Raw key creation at a rate of 3076 bits/s with a 5.0% quantum biterror rate was achieved over 20 km of fiber. The stability of the PLC interferometer was examined...  Differentialphaseshift quantum key distribution with an extended degree of freedomToshimori Honjo
NTT Basic Research Laboratories, NTT Corporation, Atsugi shi 243 0198, Japan
Opt Lett 31:5224. 2006..Extending the degree of freedom makes it possible to strengthen the DPSQKD scheme against interceptandresend attacks. The feasibility of this idea is experimentally demonstrated...  Differentialphase quantum key distribution experiment using a series of quantum entangled photon pairsToshimori Honjo
NTT Basic Research Laboratories, NTT Corporation, Kanagawa, Japan
Opt Lett 32:11657. 2007..As a consequence, we successfully generated sifted keys with a quantum bit error rate of 8.3% and a key generation rate of 0.3 bit/s and revealed the feasibility of this QKD scheme...  Differentialphaseshift quantum key distribution experiment using fast physical random bit generator with chaotic semiconductor lasersToshimori Honjo
NTT Basic Research Laboratories, NTT Corporation, 3 1 Morinosato Wakamiya, Atsugi shi, Kanagawa, 243 0198, Japan
Opt Express 17:905361. 2009..Stable operation is demonstrated for over one hour, and sifted keys are successfully generated at a rate of 9.0 kbps with a quantum bit error rate of 3.2% after 25km fiber transmission...  Longdistance entanglementbased quantum key distribution over optical fiberT Honjo
NTT Basic Research Laboratories, NTT Corporation, Atsugi shi 243 0198, Japan
Opt Express 16:1911826. 2008..In the experiment, which lasted approximately 8 hours, we successfully generated a 16 kbit sifted key with a quantum bit error rate of 6.9 % at a rate of 0.59 bits per second, from which we were able to distill a 3.9 kbit secure key...  Efficient and lownoise singlephoton detection in 1550 nm communication band by frequency upconversion in periodically poled LiNbO3 waveguidesH Kamada
NTT Basic Research Laboratories, NTT Corporation, Kanagawa, Japan
Opt Lett 33:63941. 2008..We observed an internal conversion efficiency as high as 40% and demonstrated scaling down to the single photon level while maintaining a background darkcount rate of 10(2)s(1)...